i live within 7 miles of three airports...
and under the flight path of the Los Angeles County Fire
Department...

around sunset we get at least one huey and one blackhawk
helicopter from the LACFD flying home to roost. The older hueys
make a few laps before they settle down, the Blackhawk just powers down to the landing pad. On the overhead pass you hear the chopper and then the house vibrates, the windows follow and you go deaf for a few minutes...it's worth it knowing they are out there taking care of the county..

Van Nuys airport is where most of the network the television helicopters roost-when there is a car chase on TV you see up to 10 choppers flying above the freeway!!

there may be two from the hiway patrol and/or police dept...
the rest are from T.V. stations..

we used to have a 'Heroes in the Air' airshow at a dam/rec center
up the street, and an airshow at VN but that A-hole, OBL took care of that. they cancelled due to security concerns.

They most awesome aircraft/heli is the OSPREY tilt rotor
plane, I saw one, close up at the yearly airshow at Edwards
AFB. It did not fly, they had it in a hanger, but it's a wonderful piece of machinery!!!!